SMTP Deliverability Tester
Verification and pre-signing mail tool
SMTP Hostname
SMTP Port
SMTP Username
SMTP Password
Sender Name
Sender Email Address
Recipient Email Address
Email Subject
Email Plain Text Message
DKIM Client Pre-signing (Optional)
SHOW DKIM
DKIM Domain Name
DKIM Key Selector
DKIM RSA Private Key (2048-bit)
SEND TEST EMAIL
smtp-diagnostics.log